<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>

        .content {
            border: 1px solid #000;
            height: 500px;
            padding: 20px;
        }

        .left {
            width: 200px;
            height: 500px;
            background: red;
            position: absolute;
        }

        .right {
            height: 100%;
            background: pink;
            margin-left: 200px;
        }
    </style>
</head>
<body>


<div class="content">
    <div class="left"></div>
    <div class="right">right</div>
</div>
</body>
</html>
